public final class DisjunctionMaxQuery extends Query implements java.lang.Iterable<Query>
Modifier and Type | Class and Description |
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protected class |
DisjunctionMaxQuery.DisjunctionMaxWeight
Expert: the Weight for DisjunctionMaxQuery, used to
normalize, score and explain these queries.
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Constructor and Description |
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DisjunctionMaxQuery(java.util.Collection<Query> disjuncts,
float tieBreakerMultiplier)
Creates a new DisjunctionMaxQuery
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Modifier and Type | Method and Description |
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Weight |
createWeight(IndexSearcher searcher,
boolean needsScores,
float boost)
Create the Weight used to score us
|
boolean |
equals(java.lang.Object other)
Return true iff we represent the same query as o
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java.util.List<Query> |
getDisjuncts() |
float |
getTieBreakerMultiplier() |
int |
hashCode()
Compute a hash code for hashing us
|
java.util.Iterator<Query> |
iterator() |
Query |
rewrite(IndexReader reader)
Optimize our representation and our subqueries representations
|
java.lang.String |
toString(java.lang.String field)
Prettyprint us.
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classHash, sameClassAs, toString
public DisjunctionMaxQuery(java.util.Collection<Query> disjuncts, float tieBreakerMultiplier)
disjuncts
- a Collection<Query>
of all the disjuncts to addtieBreakerMultiplier
- the score of each non-maximum disjunct for a document is multiplied by this weight
and added into the final score. If non-zero, the value should be small, on the order of 0.1, which says that
10 occurrences of word in a lower-scored field that is also in a higher scored field is just as good as a unique
word in the lower scored field (i.e., one that is not in any higher scored field.public java.util.Iterator<Query> iterator()
iterator
in interface java.lang.Iterable<Query>
Iterator<Query>
over the disjunctspublic java.util.List<Query> getDisjuncts()
public float getTieBreakerMultiplier()
public Weight createWeight(IndexSearcher searcher, boolean needsScores, float boost) throws java.io.IOException
createWeight
in class Query
needsScores
- True if document scores (Scorer.score()
) are needed.boost
- The boost that is propagated by the parent queries.java.io.IOException
public Query rewrite(IndexReader reader) throws java.io.IOException
public java.lang.String toString(java.lang.String field)
public boolean equals(java.lang.Object other)
equals
in class Query
other
- another objectQuery.sameClassAs(Object)
,
Query.classHash()
public int hashCode()
hashCode
in class Query
Query.equals(Object)
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